CN108247074A - A kind of device and method for being used to prepare inexpensive high cleanliness spherical metal powder - Google Patents
A kind of device and method for being used to prepare inexpensive high cleanliness spherical metal powder Download PDFInfo
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- CN108247074A CN108247074A CN201810369254.9A CN201810369254A CN108247074A CN 108247074 A CN108247074 A CN 108247074A CN 201810369254 A CN201810369254 A CN 201810369254A CN 108247074 A CN108247074 A CN 108247074A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0848—Melting process before atomisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/088—Fluid nozzles, e.g. angle, distance
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Abstract
A kind of device and method for being used to prepare inexpensive high cleanliness spherical metal powder, belongs to metal powder preparing technical field.The preparation method includes：Alloy electrode pole is fixed on feed compartment grasping system；To working chamber and spray chamber forvacuum, then inert gas shielding is filled with to chamber；Electrode is placed in radio-frequency induction coil, the feed speed of electrode is adjusted according to burn-off rate, is dripped naturally after electrode melting；Annular distance atomizer valve is opened, when alloy liquid stream flows through atomizer, the high-speed pulse air-flow that liquid stream is atomized nozzle generation smashes and solidifies to form attritive powder particle, is cooled into powder；It is collected through cyclonic separation；The inert gas after atomization is participated in through compressor device by gas-powered to a closed gas circulation circuit, gas caches through two-stage compression by filtering, purification processes, participates in atomization process again.Obtained powder granularity is good, oxygen content is low, spherical shape is good, production cost is low, meets the requirement of 3D printing industry.
Description
Technical field
The invention belongs to metal powder preparing technical fields, and in particular to it is spherical that one kind is used to prepare inexpensive high cleanliness
The device and method of metal-powder.
Background technology
The core of metal 3D printing technique is material and device, with the development of metal 3D printing technique, device gradually into
It is ripe, but the material category for being presently available for metal 3D printing is few, performance is unstable, prior powder metallurgy with metal powder material also
It cannot suitable metal 3D printing technique completely.In addition, the development and production of tailored version metal powder are concentrated mainly on external minority
Ji Jia metal powder metallurgies company, the country have the ability production suitable for the high quality spherical metal powder powder material of metal 3D printing
Enterprise is few, and China's relevant industries self-technique level is limited, and 3D printing metal powder requires sphericity height, oxygen content
Low, narrow particle size distribution, and it is domestic metal powder material performance study, technology of preparing data accumulation etc. compare hide it is weary.Mesh
Before, the material that China's 3D printing rapid shaping technique uses need to put into huge essence from external import or equipment manufacturer oneself mostly
Power and funds development, it is expensive, cause that increased production cost.Therefore the performance and cost problem of good material are solved, it will more
The development of the rapid shaping technique in China is pushed well.
It is rotten that method prepared by metal-powder mainly includes gas atomization, liquid droplet ejection method, chopping punching weight cautery therapy, electric spark
Erosion method etc..Wherein, gas atomization is to develop a kind of very fast, widely used powder technology of preparing in recent years.Gas atomization
Powder is prepared, is to act on melting liquid stream using high-voltage high-speed airflow, the kinetic energy of high-speed gas is converted into the surface energy of molten drop,
And then melt is crushed and to form fine drop and nodularization cooling generation powder.Gas-atomized powder has that environmental pollution is small, technique is simple
Singly, the advantages that cooling velocity is fast, the powder of preparation have many advantages, such as that sphericity is high, ingredient is uniform, crystal grain is tiny, but there is also
Size distribution is wide, and oxygen content is high, consumes the problems to be solved such as a large amount of gases, of high cost.
Existing milling method and device, after an alloy electrode pole uses to the greatest extent, it is necessary to feed compartment is opened, due to adding
Material room, working chamber, spray chamber interconnect, and when opening feed compartment, the inert gas being full of in working chamber, spray chamber will escape
Go out, so must again be vacuumized to feed compartment, working chamber, spray chamber before melting, atomization, then again to working chamber, spray chamber
Pour the inert gas of certain pressure.
Invention content
The purpose of the present invention is to solve existing metal-powder preparation method is of high cost, finished product oxygen content is high, granularity
The problem of distribution is wide, provides a kind of device and method for being used to prepare inexpensive high cleanliness spherical metal powder, utilizes the dress
Put and this method can effectively prepare high cleanliness, high sphericity metal-powder, and particle diameter distribution is than existing aerosolization
Metal powder prepared by method is narrow, in preparation process, by gas reclaiming clean, recycles, greatly reduces production cost, suitable
The development trend of powder technology is answered, meets the requirement of 3D printing industry.
To achieve the above object, the technical solution that the present invention takes is as follows：
A kind of device for being used to prepare inexpensive high cleanliness spherical metal powder, the device include hoisting mechanism, charging
Room, gate valve, working chamber, radio-frequency induction coil, annular distance gas atomizing nozzle, spray chamber, vacuum pipe, gas ducting, whirlwind
Separator, vacuum system and inert gas recovering and purifying system；
The hoisting mechanism lower part is connected with feed compartment, and feed compartment lower part is provided with working chamber, between feed compartment and working chamber
Junction be provided with gate valve, being isolated with connecting of feed compartment and working chamber, melting can be controlled by the plug of gate valve
Interior is provided with radio-frequency induction coil, is provided with spray chamber below working chamber, annular distance gas is equipped between working chamber and spray chamber
Body atomizer, vacuum pipe are connected respectively with feed compartment, working chamber, spray chamber, gas ducting respectively with working chamber and atomization
Room is connected, and spray chamber is connected with cyclone separator, and cyclone separator is connected with inert gas recovering and purifying system.
A kind of method that inexpensive high cleanliness spherical metal powder is prepared using above-mentioned device, the method include with
Lower step：
Step 1：In feed compartment, the alloy electrode pole that will match with radio-frequency induction coil is vertically fixed on hoisting mechanism
On；
Step 2：Feed compartment is closed, by vacuum pipe to feed compartment, working chamber and spray chamber forvacuum, vacuum degree≤6.7
×10-2Pa, step-up ratio≤0.67Pa/h, pumpdown time≤15 minute, then by gas ducting to working chamber and spray chamber
Inert gas shielding is filled with, it is 0.9 ~ 1.1atm to make working chamber and atomization room pressure；
Step 3：It is driven by motor, the alloy electrode pole slowly rotated is placed in radio-frequency induction coil, electrode rotary is kept
Certain rotating speed, the feed speed of electrode is adjusted according to burn-off rate, and adjusting range is 0 ~ 100mm/min；Radio-frequency induction coil
Induced power is 70 ~ 100kW, and electrode melting forms tiny liquid stream, is dripped naturally；
Step 4：Annular distance gas atomizing nozzle is opened simultaneously, pressure is 2.5 ~ 4MPa, when aluminium alloy flows through annular distance gas atomization spray
During mouth, high-speed flow that liquid stream is generated by annular distance gas atomizing nozzle uniformly, fully smash and solidify to form attritive powder particle,
It is cooled into powder；
Step 5：After powder cooling, through cyclone collection；
Step 6：The inert gas come out from cyclone separator is cooled down through heat exchanger, passes through cyclone filter, fine filter
Filtering, is compressed by the compressor to gas purge system, the gas through heat exchanger by gas purge system is down to room temperature, then leads to
Cross high pressure compressor by inert gas compression after pulse buffer tank is stablized, reach atomization process condition requirement atomizing pressure and
Gas flow rate, gas can participate in atomization process again；
Step 7：The reactive alloys powder of particle size range needed for being sieved under inert gas shielding using vibrating screen is simultaneously packed.
A kind of application of the inexpensive high cleanliness spherical metal powder of above-mentioned preparation, the powder diameter of preparation are distributed as 15
~ 45 μm, D50（Average grain diameter）≤ 32 μm, oxygen content≤1000ppm, sphericity is 90% ~ 95%, is mainly used in laser fusion
Metal deposit increasing material manufacturing.
A kind of application of the inexpensive high cleanliness spherical metal powder of above-mentioned preparation, the powder diameter of preparation are distributed as
106~205μm：3.0%~5.0%、75~106μm：40%~45%、45~75μm：45%~50%、0~45μm：3.0% ~ 6.0%, wherein, powder
Last grain size is 45 ~ 106 μm, oxygen content≤1000ppm, and the power applications that sphericity is 90% ~ 95% increase material system in electron beam melting
It makes and laser solid forming.
The present invention is relative to the advantageous effect of the prior art：
（1）Fuel pulverizing plant of the present invention by the closing of gate valve, it can be achieved that the independent vacuum breaker of feed compartment, and can lead to
Vacuum pipe is crossed individually to vacuumize feed compartment, working chamber and spray chamber and vacuumize simultaneously, when replacing alloy electrode pole,
The vacuum degree or inert gas atmosphere of working chamber and spray chamber can not be destroyed, not only reduces working chamber, spray chamber is taken out again
Vacuum, then inert gas this process is poured, and also avoid the waste of inert gas, reduce manufacture cost.
（2）It using annular distance gas atomizing nozzle, is designed, obtained uniform, high speed using unique, efficient Laval spray orifices
Inert gas flow, it is small to obtain atomized powder grain size, and it is wide to solve the problems, such as that gas atomization prepares metal powder size distribution, carries
The production efficiency of high refining metallic powder, and improve the fine powder recovery rate of metal powder.
（3）Annular distance gas atomizing nozzle has used the water conservancy diversion tube boot that fine copper manufactures, and water conservancy diversion tube boot can be quickly and easily
Replace, reduce due to nozzle dross, water conservancy diversion hole plug and dismantle, replace time of entire nozzle, and fine copper water conservancy diversion is managed and protected
Metal dross etc. is highly susceptible to removing on set, does not stay damage.
（4）Metal-powder manufacturing device of the present invention includes inert gas recovering and purifying system, effectively increases
Gas reclaiming rate, recycling tolerance make production cost reduce by more than 30% in the range of 90 ~ 95%.
Description of the drawings
Fig. 1 is the device of the invention structure chart.
Fig. 2 is annular distance gas atomizing nozzle structure chart in apparatus of the present invention.
Fig. 3 is inert gas recovering and purifying system flow chart.
Specific embodiment
Technical scheme of the present invention is further described with reference to the accompanying drawings and examples, however, it is not limited to this,
It is every that technical solution of the present invention is modified or replaced equivalently, without departing from the spirit and scope of technical solution of the present invention,
It should all cover in protection scope of the present invention.
Specific embodiment one：As shown in Figure 1, present embodiment record is that one kind is used to prepare inexpensive high cleanliness
The device of spherical metal powder, the device include hoisting mechanism 1, feed compartment 2, gate valve 4, working chamber 5, radio-frequency induction coil
Circle 6, annular distance gas atomizing nozzle 7, spray chamber 8, vacuum pipe 9, gas ducting 10, cyclone separator 21, vacuum system 35 and
Inert gas recovering and purifying system；
1 lower part of hoisting mechanism is feed compartment 2, and 2 lower part of feed compartment is provided with working chamber 5, feed compartment 2 and working chamber 5 it
Between junction be provided with gate valve 4, by the plug of gate valve 4 can control feed compartment 2 and working chamber 5 be isolated and company
It is logical, radio-frequency induction coil 6 is provided in working chamber 5,5 lower section of working chamber is provided with spray chamber 8, between working chamber 5 and spray chamber 8
Annular distance gas atomizing nozzle 7 is installed, vacuum pipe 9 is connected respectively with feed compartment 2, working chamber 5, spray chamber 8, gas ducting 10
It is connected respectively with working chamber 5 and spray chamber 8, spray chamber 8 is connected with cyclone separator 21, and cyclone separator 21 is returned with inert gas
It receives cleaning system to be connected, 25 is are externally supplied inert gas.
First, the feed compartment 2 by the closing of gate valve 4, it can be achieved that independent vacuum breaker；
2nd, feed compartment 2, working chamber 5 and spray chamber 8 can individually be vacuumized by vacuum pipe 9 and vacuumized simultaneously.
Specific embodiment two：One kind described in specific embodiment one is used to prepare inexpensive high cleanliness spherical metal
The device of powder, as shown in Fig. 2, the annular distance gas atomizing nozzle 7 include upper cover 11, drain tube boot 12, catheter 13,
Lower cover 14；
11 upper center of upper cover is equipped with shoulder through-hole, and drain tube boot 12 is mounted in the shoulder through-hole of upper cover 11, and drain is managed and protected
12 hollow spaces are covered for catheter 13, and the middle and lower part of upper cover 11 is arranged in lower cover 14, enclosed shape between upper cover 11 and lower cover 14
Into air cavity 16,14 side of lower cover is equipped with multiple air admission holes 15 communicated with the air cavity 16, and 14 lower part of lower cover is equipped with shoulder hole,
The shoulder end face of lower cover 14 is equipped with multiple Laval spray orifices 17, the multiple Laval spray orifices 17 being arranged on 14 shoulder end face of lower cover
The annular spread centered on nozzle centerline.
Specific embodiment three：One kind described in specific embodiment two is used to prepare inexpensive high cleanliness spherical metal
The device of powder, each Laval spray orifices 17 include contraction section 20, throat 19 and expansion segment 18, the contraction section
20 connection air cavitys 16, are connected with throat 19 in the lower end of contraction section 20, expansion segment 18 are connected in the lower end of throat 19；It is arranged on
17 center line of Laval spray orifices and the angle of the center line of annular distance gas atomizing nozzle 7 on the shoulder end face of lower cover 14 are injection
Vertex angle theta, θ are 22.5 °~30 °；The center circle diameter of the Laval spray orifices 17 be D, D=16 ~ 20mm.
Specific embodiment four：One kind described in specific embodiment two is used to prepare inexpensive high cleanliness spherical metal
The device of powder, 7 each structure of annular distance gas atomizing nozzle（Contraction section, throat, expansion segment）Between it is close by sealing ring
Envelope, using being bolted；The drain tube boot 12 is made of fine copper；Drain tube boot 12 is cone with 11 mating part of upper cover
Shape；13 a diameter of 6 ~ 10mm of catheter, the length that drain tube boot 12 is stretched out in 14 lower part of lower cover are 2 ~ 5mm；
17 quantity of Laval spray orifices is 20 ~ 24, and high-pressure inert gas enters air cavity 16 by the air admission hole 15 on nozzle,
Then it is sprayed by Laval spray orifices 17.
Specific embodiment five：One kind described in specific embodiment one is used to prepare inexpensive high cleanliness spherical metal
The device of powder, as shown in figure 3, the inert gas recovering and purifying system is by heat exchanger 1, cyclone filter 23, essence
Fine filtrator 24, compressor 28, gas purge system 29, heat exchanger 2 30, stage compressor 31, heat exchanger 3 32, height
Pressure compressor 33, pulse buffer tank 34 are sequentially connected with.
Specific embodiment six：A kind of device system described in using any specific embodiment of specific embodiment one to five
The method of standby low cost high cleanliness spherical metal powder, the method comprise the steps of：
Step 1：In feed compartment 2, the alloy electrode pole 3 of induction coil size will be met, be vertically fixed on hoisting mechanism 1
On；
Step 2：Feed compartment 2 is closed, by vacuum pipe 9 to 8 forvacuum of feed compartment 2, working chamber 5 and spray chamber, vacuum degree
≤6.7×10-2Pa, step-up ratio≤0.67Pa/h, pumpdown time≤15 minute, then by gas ducting 10 to working chamber 5
Inert gas shielding is filled with spray chamber 8, it is 0.9 ~ 1.1atm to make pressure in working chamber 5 and spray chamber 8；
Step 3：It is driven by motor, the alloy electrode pole 3 slowly rotated is placed in radio-frequency induction coil 6, electrode rotary is protected
Certain rotating speed is held, the feed speed of electrode is adjusted according to burn-off rate, adjusting range is 0 ~ 100mm/min；Radio-frequency induction coil 6
Induced power for 70 ~ 100kW, electrode melting forms tiny liquid stream, naturally drippage；
Step 4：Annular distance gas atomizing nozzle 7 is opened simultaneously, pressure is 2.5 ~ 4MPa, when aluminium alloy flows through annular distance gas atomization
During nozzle 7, high-speed flow that liquid stream is generated by annular distance gas atomizing nozzle 7 uniformly, fully smash and solidify to form attritive powder
Particle is cooled into powder；
Step 5：After powder cooling, collected through cyclone separator 21；
Step 6：The inert gas come out from cyclone separator is cooled down through heat exchanger 22, passes through cyclone filter 23, fine mistake
Filter 24 filters, and being compressed to gas purge system 29 by compressor 28 purifies（99.9%）, purified gas is through heat exchanger 30
Cooling（Less than 100 DEG C）, heat exchanger 32 is compressed to by stage compressor 31 and is cooled further to room temperature, then pass through high pressure compressed
Machine 33 compresses inert gas after pulse buffer tank 34 is stablized, and reaches the atomizing pressure and gas stream of the requirement of atomization process condition
Speed, gas can participate in atomization process again；
Step 7：The reactive alloys powder of particle size range needed for being sieved under inert gas shielding using vibrating screen is simultaneously packed.
Specific embodiment seven：A kind of system of inexpensive high cleanliness spherical metal powder described in specific embodiment six
Preparation Method, in step 1, a diameter of 50 ~ 100mm of the alloy electrode pole 3, length is 500mm ~ 700mm, clamping side
Formula is pneumatic pinch；The inert gas being filled in working chamber 5 and spray chamber 8 is high-purity argon gas or helium；In step 3, alloy electricity
The rotating speed of polar circle stick 3 is 40 ~ 100rpm；Inert gas recycles tolerance in the range of 90% ~ 95%.
Specific embodiment eight：Inexpensive high cleanliness spherical metal powder prepared by a kind of specific embodiment six or seven
Application, the powder diameter of preparation is distributed as 15 ~ 45 μm, D50（Average grain diameter）≤ 32 μm, oxygen content≤1000ppm, sphericity
It is 90% ~ 95%, applied to laser fusion metal deposit increasing material manufacturing.
Specific embodiment nine：Inexpensive high cleanliness spherical metal powder prepared by a kind of specific embodiment six or seven
Application, the powder diameter of preparation is distributed as 106 ~ 205：3.0%~5.0%、75~106：40%~45%、45~75：45%~50%、0~
45：3.0% ~ 6.0%, wherein, powder diameter is 45 ~ 106 μm, oxygen content≤1000ppm, and the powder that sphericity is 90% ~ 95% should
For electron beam melting increasing material manufacturing and laser solid forming.
Embodiment 1：
Alloy electrode pole, diameter 50mm is made in Titanium alloy TA15, length 500mm is vertically fixed on using Pneumatic clamping
On feed compartment grasping system；To working chamber and spray chamber forvacuum, detection step-up ratio should be less than 0.67Pa/h, and vacuum degree≤
6.7×10-2Then Pa is filled with high-purity argon gas to chamber, it is 0.9 atm to make cavity indoor pressure；The electrode slowly rotated is placed in
In radio-frequency induction coil, electrode rotary keeps the rotating speed of 100rpm, and the feed speed for adjusting electrode is 100mm/min；Coil
Induced power 100kW, electrode melting form tiny liquid stream, drip naturally；Open simultaneously annular distance gas atomizing nozzle valve, pressure
For 2.5MPa, when alloy liquid stream flows through atomizer, the high-speed pulse air-flow that liquid stream is atomized nozzle generation is smashed and is solidified
Attritive powder particle is formed, is cooled into powder；After powder cooling, through cyclone collection；Using vibrating screen in indifferent gas
The lower reactive alloys powder of particle size range needed for screening of body protection is simultaneously packed；The argon gas after atomization is participated in through compressor device by gas
Body is driven into a closed gas circulation circuit, and after cyclone separator and filtration system, gas is by purification
Reason, purity is >=99.999%, and " dustless " gas is pressurized again using 2 grades of compressor sets；Behind compressor,
There are one gas cushion, for reducing the pressure oscillation generated in atomization process to the maximum extent, reach with atomizing pressure and
The atomization process condition of the related stabilization of gas flow rate, can participate in atomization process again.Obtained powder is analyzed after testing
It analyzes after tested, 15 ~ 45 μm of the powder diameter distribution of preparation, D50=31.5 μm, oxygen content 850ppm, sphericity 94%；It prepares
Powder diameter be distributed 45 ~ 106 μm, particle diameter distribution be 106 ~ 205：4.5%、75~106：43%、45~75：48.3%、0~45：
4.2%, oxygen content 850ppm, sphericity 95%.
Embodiment 2：
Electrode pole, diameter 50mm is made in titanium alloy TC 4, length 700mm is vertically fixed on feed compartment using Pneumatic clamping
On grasping system；To working chamber and spray chamber forvacuum, detection step-up ratio should be less than 0.67Pa/h, vacuum degree≤6.7 × 10- 2Then Pa is filled with high-purity argon gas to chamber, it is 1atm to make cavity indoor pressure；The electrode slowly rotated is placed in radio-frequency induction coil
In circle, electrode rotary keeps the rotating speed of 90rpm, and the feed speed for adjusting electrode is 70mm/min；The induced power 80kW of coil,
Electrode melting forms tiny liquid stream, drips naturally；Open simultaneously atomizer valve, pressure 3.5MPa, when alloy liquid stream stream
During through atomizer, the high-speed pulse air-flow that liquid stream is atomized nozzle generation smashes and solidifies to form attritive powder particle, cools down
Form powder；After powder cooling, collected through cyclonic separation；Particle size range needed for being sieved under inert gas shielding using vibrating screen
Reactive alloys powder and pack；The argon gas after atomization is participated in through compressor device by gas-powered a to closed gas circulation
In circuit, after cyclone separator and filtration system, gas passes through purification processes, and purity is >=99.999%, and profit
" dustless " gas is pressurized again with 2 grades of compressor sets；Behind compressor, there are one gas cushion, for maximum
The pressure oscillation generated in atomization process is reduced to limit, reaches the atomization work of the stabilization related with atomizing pressure and gas flow rate
Skill condition can participate in atomization process again.Obtained powder is analyzed after testing to be analyzed after tested, the powder diameter point of preparation
15~45 μm of cloth, D50=30.6 μm, oxygen content 820ppm, sphericity 93%；The powder diameter of preparation is distributed 45 ~ 106 μm, grain
Diameter is distributed as 106 ~ 205： 3.5%、75~106：43%、45~75：49.3%、0~45：4.2%, oxygen content 820ppm, sphericity are
91%。
Embodiment 3：
Electrode pole, diameter 70mm is made in titanium-aluminium alloy Ti-46Al-2Cr-2Nb, length 500mm is hung down using Pneumatic clamping
Directly it is fixed on spray chamber grasping system；, to working chamber and spray chamber forvacuum, detection step-up ratio should be less than 0.67Pa/h,
Vacuum degree≤6.7 × 10-2Then Pa is filled with high-purity argon gas to chamber, it is 1.1atm to make cavity indoor pressure；The electricity that will slowly rotate
Pole is placed in radio-frequency induction coil, and electrode rotary keeps the rotating speed of 60rpm, and the feed speed for adjusting electrode is 50mm/min；Line
The induced power 90kW of circle, electrode melting form tiny liquid stream, drip naturally；Atomizer valve is opened simultaneously, pressure is
3MPa, when alloy liquid stream flows through atomizer, the high-speed pulse air-flow that liquid stream is atomized nozzle generation smashes and solidifies to be formed
Attritive powder particle, is cooled into powder；After powder cooling, through cyclone collection；It is protected using vibrating screen in inert gas
The lower reactive alloys powder of particle size range needed for screening of shield is simultaneously packed；The argon gas after atomization is participated in drive gas through compressor device
It moves into a closed gas circulation circuit, after cyclone separator and filtration system, gas passes through purification processes,
Purity is >=99.999%, and " dustless " gas is pressurized again using 2 grades of compressor sets；Behind compressor, there are one
Gas cushion for reducing the pressure oscillation generated in atomization process to the maximum extent, reaches and atomizing pressure and gas stream
The atomization process condition of the related stabilization of speed, can participate in atomization process again.Obtained powder is analyzed after tested after testing
Analysis, 15 ~ 45 μm of the powder diameter distribution of preparation, D50=31 μm, oxygen content 750ppm, sphericity 93%；The powder grain of preparation
Diameter is distributed 45 ~ 106 μm, and particle diameter distribution is 106 ~ 205：4.1%、75~106：42%、45~75：50.7%、0~45：3.2%, oxygen content
750ppm, sphericity 94%.
Embodiment 4：
Niobium alloy Nb-10W-1Zr-0.1C is made electrode pole, diameter 50mm, length 500mm are vertical using Pneumatic clamping
It is fixed on feed compartment grasping system；To working chamber and spray chamber forvacuum, detection step-up ratio should be less than 0.67Pa/h, vacuum
Degree≤6.7 × 10-2Then Pa is filled with high-purity argon gas to chamber, it is 1.1atm to make cavity indoor pressure；The electrode slowly rotated is put
In radio-frequency induction coil, electrode rotary keeps the rotating speed of 30rpm, and the feed speed for adjusting electrode is 20mm/min；Coil
Induced power 100kW, electrode melting form tiny liquid stream, drip naturally；Open simultaneously atomizer valve, pressure 4MPa,
When alloy liquid stream flows through atomizer, the high-speed pulse air-flow that liquid stream is atomized nozzle generation smashes and solidifies to form fine powder
Last particle, is cooled into powder；After powder cooling, through cyclone collection；It is sieved under inert gas shielding using vibrating screen
The reactive alloys powder of particle size range needed for point is simultaneously packed；The argon gas after atomization is participated in through compressor device by gas-powered to one
In a closed gas circulation circuit, after cyclone separator and filtration system, gas passes through purification processes, and purity is
>=99.999%, and " dustless " gas is pressurized again using 2 grades of compressor sets；Behind compressor, delay there are one gas
Device is rushed, for reducing the pressure oscillation generated in atomization process to the maximum extent, reaches related with atomizing pressure and gas flow rate
Stabilization atomization process condition, atomization process can be participated in again.Obtained powder is analyzed after testing to be analyzed after tested, system
15 ~ 45 μm standby of powder diameter distribution, D50=29.5 μm, oxygen content 790ppm, sphericity 92%；The powder diameter of preparation point
45 ~ 106 μm of cloth, particle diameter distribution are 106 ~ 205：3.6%、75~106：41%、45~75：50.2%、0~45：5.2%, oxygen content
790ppm, sphericity 93%.
Claims (9)
1. a kind of device for being used to prepare inexpensive high cleanliness spherical metal powder, it is characterised in that：The device includes
Hoisting mechanism（1）, feed compartment（2）, gate valve（4）, working chamber（5）, radio-frequency induction coil（6）, annular distance gas atomizing nozzle
（7）, spray chamber（8）, vacuum pipe（9）, gas ducting（10）, cyclone separator（21）, vacuum system（35）And inert gas
Recovering and purifying system；
The hoisting mechanism（1）Lower part is feed compartment（2）, feed compartment（2）Lower part is provided with working chamber（5）, feed compartment（2）With
Working chamber（5）Between junction be provided with gate valve（4）, pass through gate valve（4）Plug can control feed compartment（2）With melting
Refine room（5）Isolation with connecting, working chamber（5）Inside there is radio-frequency induction coil（6）, working chamber（5）Lower section is provided with spray chamber
（8）, working chamber（5）And spray chamber（8）Between annular distance gas atomizing nozzle is installed（7）, vacuum pipe（9）Respectively with feed compartment
（2）, working chamber（5）, spray chamber（8）It is connected, gas ducting（10）Respectively with working chamber（5）And spray chamber（8）It is connected, spray chamber
（8）With cyclone separator（21）It is connected, cyclone separator（21）It is connected with inert gas recovering and purifying system.
2. a kind of device for being used to prepare inexpensive high cleanliness spherical metal powder according to claim 1, feature
It is：The annular distance gas atomizing nozzle（7）Including upper cover（11）, drain tube boot（12）, catheter（13）, lower cover
（14）；
Upper cover（11）Upper center is equipped with shoulder through-hole, drain tube boot（12）Mounted on upper cover（11）Shoulder through-hole in, lead
Liquid pipe sheath（12）Hollow space is catheter（13）, upper cover（11）Middle and lower part be arranged on lower cover（14）It is interior, upper cover（11）With
Lower cover（14）Between closing form air cavity（16）, lower cover（14）Side is equipped with multiple and described air cavitys（16）The air admission hole communicated
（15）, lower cover（14）Lower part is equipped with shoulder hole, lower cover（14）Shoulder end face be equipped with multiple Laval spray orifices（17）, it is arranged on
Lower cover（14）Multiple Laval spray orifices on shoulder end face（17）The annular spread centered on nozzle centerline.
3. a kind of device for being used to prepare inexpensive high cleanliness spherical metal powder according to claim 2, feature
It is：Each Laval spray orifices（17）Include contraction section（20）, throat（19）And expansion segment（18）, the contraction
Section（20）Connect air cavity（16）, in contraction section（20）Lower end be connected with throat（19）, in throat（19）Lower end be connected with expansion
Open section（18）；It is arranged on lower cover（14）Shoulder end face on Laval spray orifices（17）Center line and annular distance gas atomizing nozzle（7）
The angle of center line be jet apex angle θ, θ is 22.5 °~30 °；The Laval spray orifices（17）Center circle diameter for D, D=
16~20mm。
4. a kind of device for being used to prepare inexpensive high cleanliness spherical metal powder according to claim 2, feature
It is：The drain tube boot（12）It is made of fine copper；Drain tube boot（12）With upper cover（11）Mating part is taper；Institute
The catheter stated（13）A diameter of 6 ~ 10mm, drain tube boot（12）In lower cover（14）The length that lower part is stretched out is 2 ~ 5mm.
5. a kind of device for being used to prepare inexpensive high cleanliness spherical metal powder according to claim 1, feature
It is：The inert gas recovering and purifying system is by heat exchanger one（22）, cyclone filter（23）, fine filter
（24）, compressor（28）, gas purge system（29）, heat exchanger two（30）, stage compressor（31）, heat exchanger three
（32）, high pressure compressor（33）, pulse buffer tank（34）It is sequentially connected with.
6. a kind of device using described in claim 1 ~ 5 any claim prepares inexpensive high cleanliness spherical metal powder
Method, it is characterised in that：The method comprises the steps of：
Step 1：In feed compartment（2）Alloy electrode pole that is interior, will being consistent with radio-frequency induction coil（3）, it is vertically fixed on and carries
Rise mechanism（1）On；
Step 2：Close feed compartment（2）, pass through vacuum pipe（9）To feed compartment（2）, working chamber（5）And spray chamber（8）It is pre- to take out
Vacuum, vacuum degree≤6.7 × 10-2Pa, step-up ratio≤0.67Pa/h, then pumpdown time≤15 minute pass through gas ducting
（10）To working chamber（5）And spray chamber（8）Inert gas shielding is filled with, makes working chamber（5）And spray chamber（8）Interior pressure is
0.9~1.1atm；
Step 3：It is driven by motor, the alloy electrode pole that will slowly rotate（3）It is placed in radio-frequency induction coil（6）In, electrode rotation
Turn to keep certain rotating speed, the feed speed of electrode is adjusted according to burn-off rate, adjusting range is 0 ~ 100mm/min；High-frequency induction
Coil（6）Induced power for 70 ~ 100kW, electrode melting forms tiny liquid stream, naturally drippage；
Step 4：Open simultaneously annular distance gas atomizing nozzle（7）, pressure is 2.5 ~ 4MPa, when aluminium alloy flows through annular distance gas mist
Change nozzle（7）When, liquid stream is by annular distance gas atomizing nozzle（7）The high-speed flow of generation uniformly, fully smash and solidify to be formed it is micro-
Fine powder granules are cooled into powder；
Step 5：After powder cooling, through cyclone separator（21）It collects；
Step 6：The inert gas come out from cyclone separator is through heat exchanger（22）Cooling, passes through cyclone filter（23）, essence
Fine filtrator（24）Filtering, by compressor（28）It is compressed to gas purge system（29）Purification（99.9%）, purified gas warp
Heat exchanger（30）100 DEG C are cooled to hereinafter, by stage compressor（31）It is compressed to heat exchanger（32）It is cooled further to room
Temperature, then pass through high pressure compressor（33）Inert gas is compressed through pulse buffer tank（34）After stabilization, reach atomization process condition
It is required that atomizing pressure and gas flow rate, gas can participate in atomization process again；
Step 7：The reactive alloys powder of particle size range needed for being sieved under inert gas shielding using vibrating screen is simultaneously packed.
7. a kind of preparation method of inexpensive high cleanliness spherical metal powder according to claim 6, feature exists
In：In step 1, the alloy electrode pole（3）A diameter of 50 ~ 100mm, length be 500mm ~ 700mm, method of clamping
For pneumatic pinch；Working chamber（5）And spray chamber（8）The inert gas being inside filled with is high-purity argon gas or helium；In step 3, alloy
Electrode pole（3）Rotating speed be 40 ~ 100rpm.
8. a kind of application of inexpensive high cleanliness spherical metal powder prepared by claim 6 or 7, it is characterised in that：It prepares
Powder diameter be distributed as 15 ~ 45 μm, D50（Average grain diameter）≤ 32 μm, oxygen content≤1000ppm, sphericity is 90% ~ 95%,
Applied to laser fusion metal deposit increasing material manufacturing.
9. a kind of application of inexpensive high cleanliness spherical metal powder prepared by claim 6 or 7, it is characterised in that：It prepares
Powder diameter be distributed as 106 ~ 205：3.0%~5.0%、75~106：40%~45%、45~75：45%~50%、0~45：3.0%~
6.0%, wherein, powder diameter is 45 ~ 106 μm, oxygen content≤1000ppm, and the power applications that sphericity is 90% ~ 95% are in electronics
Beam melts increasing material manufacturing and laser solid forming.
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| CN201810369254.9A CN108247074A (en) | 2018-04-23 | 2018-04-23 | A kind of device and method for being used to prepare inexpensive high cleanliness spherical metal powder |
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| CN201810369254.9A CN108247074A (en) | 2018-04-23 | 2018-04-23 | A kind of device and method for being used to prepare inexpensive high cleanliness spherical metal powder |
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| CN109482896A (en) * | 2019-01-23 | 2019-03-19 | 沈阳真空技术研究所有限公司 | The semicontinuous gas-atomized powder furnace of vacuum |
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| CN111054930A (en) * | 2019-12-24 | 2020-04-24 | 航天海鹰(哈尔滨)钛业有限公司 | Annular inert gas atomizing nozzle |
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| CN114472905A (en) * | 2022-01-17 | 2022-05-13 | 江苏威拉里新材料科技有限公司 | Rapid air supply device for gas atomization powder making equipment and use method thereof |
| CN114472905B (en) * | 2022-01-17 | 2024-02-23 | 江苏威拉里新材料科技有限公司 | Quick air supplementing device for aerosolized powder making equipment and application method of quick air supplementing device |
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